diff --git a/include/transport/protocol.proto b/include/transport/protocol.proto
index 48f11bf7cd5b6354bd69b31db5d28fd20d116527..703738f63c3ba7673e5ddb4dafb59758a2f7c89d 100644
--- a/include/transport/protocol.proto
+++ b/include/transport/protocol.proto
@@ -89,6 +89,7 @@ message Room {
 message RoomList {
 	repeated string room = 1;
 	repeated string name = 2;
+	optional string user = 3;
 }
 
 enum ParticipantFlag {